P1778 Nissan: Causes, Diagnosis, and Solutions for Altima, Murano, Rogue

The P1778 Nissan code is mostly seen in three models of this company ie Altima, Murano, and Rogue. If you own a Nissan Altima, Murano, or Rogue, you may see an error code called P1778. This code indicates a problem in the transmission system of your vehicle. It is important to address this issue as soon as possible to prevent further damage and ensure smooth driving. In this article, we will explore the symptoms, causes, and step-by-step solutions for fixing P1778 in your Nissan vehicle, especially Nissan Altima, Murano, or Rogue. Here are other codes for Nissan: P1148, P0340, U1000, P1800, C1130 and P1564

Symptoms of P1778 in Nissan Altima, Murano, Rogue And Other Models

When your Nissan vehicle is affected by the P1778 error code, you may notice several symptoms that can indicate the problem. These include:

  1. Delayed or harsh shifting: Your car may experience delays when shifting gears, or you may notice sudden, jerky movements during gear changes.
  2. Slipping transmission: The transmission may slip, causing a loss of power or a feeling of the engine revving without an increase in speed.
  3. Illuminated warning lights: The “Check Engine” or “Transmission” warning lights may illuminate on your dashboard, indicating a fault in the transmission system.
  4. Poor acceleration: You may find that your vehicle struggles to accelerate smoothly, requiring more effort to reach desired speeds.

Causes of P1778 in Nissan Vehicles

The P1778 code can be triggered by several factors in your Nissan Altima, Murano, or Rogue. Some common causes include:

  1. Faulty sensors: Malfunctioning input or output speed sensors can provide incorrect data to the vehicle’s computer, leading to improper transmission control.
  2. Wiring issues: Damaged or loose wiring connections between the sensors and the transmission control module can disrupt the signal transmission, causing the error code.
  3. Transmission problems: Mechanical or hydraulic issues within the transmission, such as worn clutch plates or valve body malfunctions, can trigger P1778.

How to Diagnose P1778 in Nissan Cars

Diagnosing P1778 in your Nissan vehicle involves a systematic approach to identify the root cause. Here’s a step-by-step guide:

  1. Connect an OBD-II scanner: Use an OBD-II scanner to retrieve the error codes stored in the vehicle’s computer. P1778 is specific to the transmission system.
  2. Inspect transmission sensors and wiring: Thoroughly inspect the input and output speed sensors for any damage or corrosion. Check the wiring connections for looseness or fraying.
  3. Perform a visual inspection: Examine the transmission system for any visible leaks, loose connections, or damaged components.
  4. Test transmission fluid pressure and temperature: Use a transmission pressure gauge and a temperature sensor to measure the fluid pressure and temperature. Compare the readings to the manufacturer’s specifications.
  5. Check for other related error codes: Look for any additional error codes that may provide further insight into the underlying issue.

Solutions for Fixing P1778 in Nissan Altima, Murano, and Rogue

P1778 Nissan code fix
Man in a car with thumbs up

Once you have identified the cause of P1778, you can take appropriate steps to fix the problem. Here are some solutions:

  1. Check and repair or replace faulty sensors: If the speed sensors are malfunctioning, replace them with new ones. Ensure proper installation and secure wiring connections.
  2. Inspect and repair damaged wiring or connectors: Repair any damaged or loose wiring connections. Replace damaged wires or connectors as needed.
  3. Address transmission problems or repairs: If the issue lies within the transmission, consult a professional mechanic or transmission specialist for further inspection and repairs. They may need to replace worn-out clutch plates or repair the valve body.
  4. Clear the error codes and reset the system: After making the necessary repairs, clear the error codes using the OBD-II scanner. This will reset the system and allow you to monitor if the issue recurs.

Preventive Measures to Avoid P1778 Nissan Code Recurrence

To prevent P1778 from happening again in your Nissan Altima, Murano, or Rogue, follow these preventive measures:

  1. Regular maintenance and inspection: Adhere to the manufacturer’s recommended maintenance schedule for your vehicle’s transmission system. Regularly inspect the sensors, wiring, and other components for signs of wear or damage.
  2. Ensure proper fluid levels and quality: Check the transmission fluid regularly and top it up if needed. Use the recommended type of transmission fluid for your Nissan model.
  3. Follow recommended maintenance intervals: Replace the transmission fluid and filter at the recommended intervals to maintain optimal performance and prevent potential issues.
  4. Address any other potential issues promptly: If you notice any unusual symptoms or warning signs related to your vehicle’s transmission, seek professional assistance promptly to address the problem before it worsens.

Cost Of Fixing The P1778 Nissan Code

The P1778 Nissan code fixing cost can range from $200 to $1000 or more. The repair cost Depends on various things such as the cause of the issue, replacement or parts, labor rates of the area, and any additional repairs if required. You can talk to a professional mechanic or a dealership near you to get the best price estimate. based on your specific Nissan model and circumstances.


Which Nissan models are commonly affected by the P1778 code?

The P1778 Nissan code is commonly found on all three models: Nissan Altima, Murano, and Rogue. Although the P1778 appears on other models, too, it is the most common of these three models

Can I continue driving my Nissan vehicle with the P1778 code?

If the code called P1778 appears on your Nissan vehicle, you should not drive the vehicle. Fix this problem as soon as possible so that your car does not have other engine problems due to this problem and you can drive smoothly.

Can I fix the P1778 code in my Nissan vehicle myself?

Depending on your skills and experience, you may be able to perform some basic troubleshooting and repairs related to the P1778 code, such as checking and replacing sensors or repairing wiring connections. However, it is generally recommended to consult with a professional mechanic or dealership for complex repairs or if you are unsure

Can I clear the P1778 code myself after making the repairs?

Yes, you can use an OBD-II scanner to clear the P1778 code after making the necessary repairs. Clearing the code will reset the system and allow you to monitor if the issue reoccurs.


The P1778 code can make your transmission not work well in your Nissan Altima, Murano, Rogue, Sentra, and other models. This can affect the performance of your vehicle. By understanding the symptoms, causes, and solutions provided in this article, you can find and solve the problem in a better way. Remember to take care of your car regularly and quickly deal with any transmission problems. This will help you avoid P1778 Nissan Code from happening again and make sure your Nissan drives smoothly.